* {
  margin: 0;
  padding: 0;
}

.grade-scroll {
  height: 300px;
  width: 690px;
  border: 1px solid #ccc;

  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.grade-scroll-wrap {
  height: 300px;
}

.grade-scroll-page {
  height: 300px;
  width: 690px;
  float: left;
}

.left-btn,
.right-btn {
  background: #000;
  opacity: 0.3;
  height: 60px;
  width: 30px;
  text-align: center;
  line-height: 60px;
  color: #fff;

  position: absolute;
  top: 120px;

  cursor: pointer;
  user-select: none;
  z-index: 90;
}

.left-btn:hover,
.right-btn:hover {
  background: red;
}

.left-btn {
  border-radius: 0 5px 5px 0;
}

.right-btn {
  border-radius: 5px 0 0 5px;
  right: 0;
}

.grade-page-item {
  height: 150px;
  width: 345px;
  float: left;
  cursor: pointer;
  outline: 1px solid #f6f6f6;
  font-size: 14px;

  position: relative;
}

.grade-page-item:hover {
  background: #f6f6f6;
  outline: 1px solid blue;
}

.grade-item-p-1{
  padding: 0 20px;
  padding-top: 20px;
  height: 20px;
  margin-bottom: 10px;
}
.grade-item-p-2{
  padding: 0 20px;
  margin-bottom: 10px;
  height: 40px;
  line-height: 40px;
}
.grade-item-p-3{
  padding: 0 20px;
  height: 20px;
}

.grade-item-purple{
  color: #1976BC;
  font-size: 16px;
  font-weight: bold;
}
.grade-item-gray{
  color: #747272;
}
.pl_20{
  display: inline-block;
  margin-left: 20px;
}
.p_10{
  display: inline-block;
  margin: 0 5px;
}

.hover-dialog {
  display: none;

  height: 300px;
  width: 400px;
  background: white;
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 10px;

  position: relative;
  z-index: 910;
}

.hover-dialog::after {
  content: " ";
  
  height: 10px;
  width: 10px;
  border-top: 1px solid #ccc;
  border-right: 1px solid #ccc;
  background: #fff;
  
  position: absolute;
  top: -6px;
  left: 50%;
  margin-left: -5px;
  z-index: 100;

  transform: rotate(-45deg);
}


/* .grade-page-item:hover .hover-dialog {
  display: block;
} */
